Fluid sa clutch master turns black

[enzo18]

Fellows, the fluid in clutch master turned black. What's the cause and what should i do, may sira ba somewhere?

[v6dreamer]

Flush it. Replace w/ new fluid.

[enzo18]

Flush it. Replace w/ new fluid.

is this normal? fluid was still fresh last december 2007.

[artpogi]

that's pretty much normal because of that rubber thingy dun sa dulo ng piston sa loob ng cylinder, as long as there's no leak, that's okay

[Esnie.com]

Flush it. Replace w/ new fluid.

yes tama si V6 flush it with new fluid, mas okay kung all wheels ka magflush ng fluid para mas malinis ang linya ng brake mo. No 1 cause ng maduming fluid ay ang mga naipon na dirt sa may wheel cylinder.

[roninblade]

^ im, by far, not an expert pero.... di ba hiwalay ang fluid reservoir ng clutch master and brake master cylinder?

ontopic, wala naman kaso yan pangingitim ng fluid, cause nga lang yan nung rubber sa loob ng assembly. pag walang leak or di pa lumulusot yung clutch sa shifting, ok pa yan.

[spyghost]

yes, the masters are separate, but some cars share reservoirs. sample is the toyota vios.

if you pop your hood, you'll see only one reservoir shared by brake master and clutch master cylinders.

[spyghost]

one thing about how to distinguish a clutch master from the brake master is that the clutch master has only one piping and its connected to the transmission housing. brake however, has two pipes and its either connected to a proportioning valve (no ABS), or a hydraulic unit (w/ ABS). saka usually mas malaki ang brake master kesa clutch master.

[spyghost]

here is the pic of my engine bay... this was taken several months ago kaya madumi pa. pero super linis na sya ngayon

brake master is on the left with two pipes. clutch master is on the right with a single pipe (though hindi kita dito. natakpan ng charcoal canister)

[1D4LV]

normal lang yan bro. ipa flush mo na lang sa suking gas station mo.
i just had my brake and clutch fluids flushed two weeks ago. cost me 150 pesos sa labor tsaka isang liter ng brake and clutch fluid na 200 pesos ata.

dati sumasabit yung shifting ko, pero ngayon smooth na smooth na...

*spyghost: mas madumi pa engine bay ko sa iyo.... hehehehe. yung brake dyan is yung malaki at the left of the canister. yung clutch is yung maliit.

[roninblade]

~ weird, double post sa single click

[speedyfix]

normal lang for it to turn dark. if it keeps happening fast though that might be a sign that the master is about to go so keep on observing it.

[Carrie Tella]

The fluid of a certain master turns chocolate brown, gets small in amount and becomes more viscous. Same problem you think?

I assume it's the clutch master because it's near the brake fluid vessel, takes DOT 3 fluid only. It' s in the corner, driver's side. Inside the vessel is a rounded, black rubber like float. Corolla. Do you think so?

So how do you flush it?

Thank you. :flush::mop1:

[valvura]

normal lang for it to turn dark. if it keeps happening fast though that might be a sign that the master is about to go so keep on observing it.

up ko lang. nababawasan yung clutch fluid reservoir ko up to a point na dry up siya totally (while parked). kaya lang no visual signs of leakage. kaka papalit ko pa lang ng clutch lining & pressure plate. i just keep on refilling the reservoir para makapag shift ng gears.

what are the possible defects? kuha kaya ito ng clutch master overhall (near reservoir) using repair kit? kailangan ba itong ipagawa kaagad?

TIA

[spyghost]

i changed my clutch last weekend and at the same time i also checked out the hydraulics. it turned out that the secondary/slave cylinder is leaking. i immediately changed it along with the dark fluid that i showed earlier. i think the piston cup (rubber) dissolves with the fluid thus turning it black. ang laki kasi ng difference ng itsura nila pag tanggal ko.


fortunately i dont have leaks in my master. not sure if the rubber is still good

see my new reservoir, i mean cleaned reservoir...


what i used to clean my reservoir is fresh brake fluid, clean cotton (absorbent) rags and tightly packed cotton buds.

[valvura]

I just made a DIY in replacing my revo's OEM clutch master assembly. I
thought it was easy, however, I encountered problems that patiently, I
was also able to resolve:

1) After installing the new clutch master, I found out that the push
rod was longer than the original! I was already thinking of returning
it to the store (in Pasay) where I bought it, kaya lang, malaking
abala (since I live in Sta. Rosa, Lag.). So what I did, kinalas ko uli then re-used the old push rod and it was quite easy to remove kasi ring lock lang ang tatangalin. So successful ako doon and I reinstalled the clutch master.

2) At first try, no resistance ang clutch pedal even after a number of
pumping and bleeding. Medyo hopeless na ako until I tried to bleed the master cylinder (which I should have done in the first place), by
releasing the copper tube attached. Then nag re-bleed ako sa valve
near the secondary. Finally, I got the resistance sa pedal and puwede
na mai-shift ang gear.

Lessons learned: (a) Do not bleed or flush existing fluid in the line
before installation, just detach the copper tube at the clutch master
(just provide a pan below it to collect fluid spills). (b) Bleed the
new clutch master first before installing, but make sure you check the
dimensions of components of the new against the old clutch master.
(Baka hindi tanggapin ng store for replacement kung may fluid na).

I just spent for the cost of OEM clutch master at Php 2,950.00.

Hope this could be of help to those who intend to DIY their clutch
master assembly.

[spyghost]

just replaced my clutch secondary slave since i had a leak. i drained all existing fluid and replaced with new prestone dot3. the line was bled well until the fluid that comes out is clear. i bled it 10 more times after it was clear just to be sure.

after a month, i just noticed, my fluid is already turning dark again. i don't have leaks on both primary and secondary. i don't think this is still normal. should i also change the master cylinder internals?